Horse collar



FIG. 1 is a front, right perspective view of a horse collar showing my design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof; and,

FIG. 6 is a top view thereof, which is a mirror image of the bottom view thereof. 

CLAIM The ornamental design for a horse collar, as shown and described. 